/*
 * Copyright (C) 2010-2014 Enrique Lara (enrique.posix2.lara@gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package app.transittool;

import android.content.Context;

import android.os.PowerManager;

import app.transittool.util.Log;

final class AlertWakeLock {
    private static final String TAG = "AlarmAlertWakeLock";
    private static PowerManager.WakeLock cpuWakeLock;

    private AlertWakeLock() {
    }

    static synchronized void acquireCpuWakeLock(final Context context) {
        Log.d(TAG, "Acquiring cpu wake lock");

        if (cpuWakeLock != null) {
            return;
        }

        final PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
//        cpuWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.ON_AFTER_RELEASE, TAG);
        cpuWakeLock = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK | PowerManager.ON_AFTER_RELEASE, TAG);

        cpuWakeLock.acquire();
    }

    static synchronized void releaseCpuLock() {
        Log.d(TAG, "Releasing cpu wake lock");

        if (cpuWakeLock != null) {
            cpuWakeLock.release();
            cpuWakeLock = null;
        }
    }
}
